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UNITE STATES PATENT. OFFICE.

MAX EPTING, OF HGOHST-ON-THE-VIAIN, GERMANY, ASSIGNOR TO THE FARE- WERKE, VORMALS ll/IEISTER, LUCIUS & BRUNING, OF SAME PLACE.

RED DYE.

SPECIFICATION forming part of Letters Patent No. 473,453, dated April 26, 1892.

Application filed June 25, 1891. Serial No. 397,520. ($peimens.)

T0 00% whom it may concern.- Be it known that I, MAX EPTING, a citizen of the Empire of Germany, residing at Hochstand orthotoluidine is obtained by joint oxidation a novel product not known before the triamido-triortho-tolylcarbinol /C l-I NH HO OO,H NH \C H NH respectively a salt of this body. From this triamido-triortho-tolylcarbinol I have produced by sulphonization a novel product, which is the object of the present application for Letters Patent.

By the following description is exemplified the manner of preparing this novel product:

One hundred parts, by weight, of triamidotriortho-tolylcarbinol or the equivalent quantity of its hydrochlorate are dissolved in from four hundred to five hundred parts, by weight, of fuming sulphuric acid of about twenty per cent. anhydride and the solution heated to a temperature of from 100 to 120 oentigrade until a sample gives a clear solution with ammonia. Aocordin g to the temperature and to the heating being kept up for a longer or shorter time, there will be obtained mono di or tri sulphonic acid, the last acid being prominent when the heating is made under the conditions specified. The product of the reaction is mixed with water, from which the sulphonic acid can be precipitated by means of sulphate of soda; but it will be found preferable to convert it into the calcium salt by adding lime, then to filter off from the gypsum, and afterward to convertinto the sodium salt by means of soda. On evaporating the solution obtained in the latter manner the neutral sodium salt is obtained in the form of a slightly-r'ed-colored powder. l/Vhen, however, on evaporating, some hydrochloric acid is added, so that a part of the sodium is taken from the neutral salt, the product obtained will present itself in the form of a green mass havingmetallic luster. In Wateritis of easy solubility, but in alcohol it is insoluble.

Having thus described my invention and in what man ner it can be performed, that What I claim as new and my invention is The newdye derived from triamido-triorthotolylcarbinol, which in the form of its sodium salt is a green mass having metallic luster, of easy solubility in water, but insoluble in absolute alcohol, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

MAX EPTING.

\Vitnesses:

Josnr REvERnY. HEINRICH HAHN. 

